Metal-working.



D. B. MARWIGK.

METAL WORKING.

APPLICATION TILED 3.24, 1913.

1 ,1 1 0,000. Patented Sept. 8, 1914.

WITNESSES W INVENTOR Z; 'C :5 David B. Mamwick: W Y M? m NJ- ATTORN BY THE NORRIS PETERS 60.. FHOTO-LITHQ. WASHINGTON. D. C.

UNITED STATES PATENT ITIQE.

DAVID B. ILEARWICK, F NEVT BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY WORKS, OF NEW BRITAIN, CONNECTICUT,

A CORPORATION OF CONNECTICUT.

METAL-WORKING.

Patented Sept. 8, 1914.

Application filed March 24, 1913. Serial No. 756,319.

To all whom it may concern:

Be it known that I, DAVID B. Manwrox, a citizen of the United States, and resident of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Metal- Working, Of which the following is pecification.

The invention relates to that branch of the art of metal working wherein the size or shape, or both the size and shape of a length of stock is changed by passing the stock between a pair of reducing rolls, the stock being either hot or cold.

The invention has been developed in connection with a cold-rolling process.

The invention provides means for varying the width of the product without varying its thickness. That is to say, given two pieces of stock of identical size and cross sectional shape, it is possible by this process to reduce these pieces of stock to a product having the same thickness but different width, by passage through the same pair of reducing rolls.

An apparatus in which the invention can be carried out is diagrammatically illustrated in the drawings, where Figure 1 1s a plan view, and Fig. 2 is a sectional plan view with the top roll removed.

In these drawings a, a denote the reducing rolls and Z) a guide for the stock 0. The guide is shown as having a plurality of grooves which are intended to take a plurality of pieces of stock to be acted upon at the same time. The drawing shows two grooves in the guide, but by changing the angle of inclination at which the stock is fed to the rolls the number can be increased, as is obvious. The stock is fed to the rolls at an acute angle to their axes, or at other than a right angle thereto, and by so feeding the stock to the rolls the width of the product is greater than when the stock is fed to the rolls at right angles to their axes, as is the usual custom, and by varying the angle of feed, the width of the product can be varied within substantial limits.

It is common practice to reduce sheet metal strips of specified width and thickness by passing stock of proper size through reducing rolls, and for each specified width .introduce one corner of product of a given thickness, a separate stock must be carried which by reduction will give the desired width. By this invention stock of a given size can be manufactured into product of varying widths, with obvious consequent advantages to the manufacturer.

In practice it has been found that the product leaves the reducing rolls at right angles to their axes no matter at what angle the stock is fed to the rolls. It is to be understood that in describing the stock as fed to the rolls at an acute angle to their axes I mean to imply that each point in a strip of stock is moving toward the rolls at such an angle. I am aware that it has long been the practice in'rolling sheet metal to of the sheet to the rolls so that the sheet as a whole in passing through the rolls may be said to be disposed angularly to the roll axis, but it will be apparent that any given point in the sheet moves toward the rolls at right angles to their axes. Applicants process is distinguished from this in that any and every given point in orpart of the stock is fed at an acute angle to the axes of the rolls.

I claim as my invention 1. The herein described method which consists in feeding stock from the front of a pair of reducing rolls at an acute angle to their axes.

2. The herein described method which consists in passing stool: between a pair of reducing rolls in a direction which is generally transverse to their axes, and feeding said stock to said rolls at an acute angle to their axes.

3. In an apparatus of the character described, the combination with reducing rolls rotating on their axes in opposite directions, of means for feeding stock to said rolls from the front at an acute angle to their axes.

It. In an apparatus of the character de scribed, the combination with a pair of reducing rolls rotating on their axes in opposite directions, of a stock feeding guide arranged in front of said rolls and at an acute angle to their axes.

DAVID B. MARVVICK.

Witnesses:

S. W. PARSONS, W. E. DOANE.

-h Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, I). G. 

